I made a mistake, placing the false back too far into the case, which required having to re-fabricate the back sheet. But I figured I could take advantage of the situation by improving the mounting of the motherboard tray, by fastening the tray to the false back with a 7/8-inch long spacer.

I don't remember if I already offered this tip before, but I try to reduce the wear and tear on my 1/2-inch flush cutting router bit by first rough cutting with a 3/16-inch spiral downward cutting bit.

Turned out that I needed to cut one more slot out of the bottom shelf. But the last time I used my wooden "small slot" router template, I somehow managed to crush one edge, so I quickly cobbled together a new out of some left over t-slot extrusion. I'm really loving using these t-slot extrusions to make router templates - fast and accurate!

Performed the mind-numbing task of fastening the bottom and top sheets to the case frame via flat head socket cap screws. Through and countersink holes were drilled into the sheet and transferred to the case frame via a self-centering counterbore drill bit.

Finished the lower portion of the back sheet, which involved installing the PEM nuts, trimming the PSU mounting plates to the final size and creating an extra solid cover plate (which I almost forgot to do).